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alvin · 12-18-2013, 04:34 PM

I can confirm the accuracy and reliability is highly related with the bore/chamber condition.

One great example was a 1914 made cal 7,63mm. The gun came to me with excellent bore. I fired some rounds from it, it worked almost flawlessly. Side by side, even my modern Norinco Tokarev and Interarms P1 had more ejection/feeding problems than this one. It could fire hundreds of rounds without any issue, you know, like firing a Glock, just bang, bang without any problem, that's a little bit boring after a while. With stock attached, it's easy to hit a head size target at 50 yards, and a chest size target at 100 yards.

Another example is a 1897 made 7,63mm. The bore can be rated as good. Not shiny, frosted, but still has complete rifling. Due to this thing came to me more expensive, I only tried 20 rounds from it. It worked fine, no malfunction. At 10 yards, it could hit a head size target. The distribution is definitely bigger than the 1914 one. Probably it can do better, but I tried it indoor, the lighting condition of the range was poor, and my main purpose was to see it works or not, so I did not try longer distance. However, the ejected cartridge case cannot be inserted back into chamber easily -- that implies the chamber was a little worn.

Yet another example... also an antique 7,63mm. The bore and chamber were worn. It did not cycle correctly unless the ammo is oiled. Otherwise, no extraction no ejection. I don't really observe where the 10 rounds hit,,,, accuracy was not important when there was a cycling issue. The fired cartridge case cannot be feed into chamber again. So, this one will stay on the wall.

===

{Edit} From the very last example, I think I will do this on test firing any C&R in future: just fire a single round first, then put the used cartridge case back into chamber. If the case does not slip into chamber easily, STOP! Continue firing could damage the extractor or other parts of the gun.

12-18-2013, 04:34 PM	#2
alvin User Join Date: Jul 2007 Location: US Posts: 3,843 Thanks: 132 Thanked 729 Times in 438 Posts	I can confirm the accuracy and reliability is highly related with the bore/chamber condition. One great example was a 1914 made cal 7,63mm. The gun came to me with excellent bore. I fired some rounds from it, it worked almost flawlessly. Side by side, even my modern Norinco Tokarev and Interarms P1 had more ejection/feeding problems than this one. It could fire hundreds of rounds without any issue, you know, like firing a Glock, just bang, bang without any problem, that's a little bit boring after a while. With stock attached, it's easy to hit a head size target at 50 yards, and a chest size target at 100 yards. Another example is a 1897 made 7,63mm. The bore can be rated as good. Not shiny, frosted, but still has complete rifling. Due to this thing came to me more expensive, I only tried 20 rounds from it. It worked fine, no malfunction. At 10 yards, it could hit a head size target. The distribution is definitely bigger than the 1914 one. Probably it can do better, but I tried it indoor, the lighting condition of the range was poor, and my main purpose was to see it works or not, so I did not try longer distance. However, the ejected cartridge case cannot be inserted back into chamber easily -- that implies the chamber was a little worn. Yet another example... also an antique 7,63mm. The bore and chamber were worn. It did not cycle correctly unless the ammo is oiled. Otherwise, no extraction no ejection. I don't really observe where the 10 rounds hit,,,, accuracy was not important when there was a cycling issue. The fired cartridge case cannot be feed into chamber again. So, this one will stay on the wall. === {Edit} From the very last example, I think I will do this on test firing any C&R in future: just fire a single round first, then put the used cartridge case back into chamber. If the case does not slip into chamber easily, STOP! Continue firing could damage the extractor or other parts of the gun.